Just clarifying. I agree that they're next to useless as they are.
My guess is they were looking for a way to allow posting comments on the main species pages, but they weren't able to do it on the page itself. So, the best they could come up with was to create a forum thread for each species and start each one with a link to the corresponding species page. It's a decent enough idea, but it's just too clunky to be useful in practice.